Ultrasonic coating liquid temperature control device and method

Abstract

The invention discloses an ultrasonic coating liquid temperature control device which comprises a liquid storage part fixedly arranged in an ultrasonic part, a coating head connected with the liquid storage part through a liquid feeding pipeline, a water bath temperature control part and a liquid return pipeline. The liquid feeding pipeline is provided with a first liquid pump assembly. The water bath temperature control part is fixedly arranged on the liquid feeding pipeline and is further provided with a water feeding pipeline and a water discharging pipeline. The water feeding pipeline is further provided with a proportional flow valve. The two ends of the liquid return pipeline are connected with the liquid feeding pipeline and the liquid storage part correspondingly, and the connecting position of the liquid return pipeline and the liquid feeding pipeline is located between the water bath temperature control part and the first liquid pump assembly. A second liquid pump assembly is installed on the liquid return pipeline. The invention further discloses an ultrasonic coating liquid temperature control method. The ultrasonic coating liquid temperature control device and method are mainly used for eliminating clumps or bubbles in coating liquid and preventing changes of characteristics such as viscosity and rheological property of coating liquid obtained after ultrasonic treatment due to temperature changes, and the influences on stability of the aspects of the thickness and structure of a coating film are reduced.

Description

technical field [0001] The invention relates to a coating liquid temperature control device, in particular to an ultrasonic coating liquid temperature control device and method. Background technique [0002] As a mature and simple technology, coating technology is widely used in the field of film forming, from traditional papermaking, textile to precision optical film, as well as the rapid development of solar cells and lithium battery separators in recent years, all of which are based on coating. processing and production methods. As an important part of coating technology - liquid supply system, its stability is of great significance to the quality of coating film forming. In the liquid supply system, the stability of the coating liquid is particularly important. When there are air bubbles in the coating liquid or agglomeration of the coating liquid occurs, fatal defects will occur during film formation. There are two main ways to eliminate the agglomerates or bubbles in...

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Problems solved by technology

There are two main ways to eliminate the agglomerates or bubbles in the coating liquid that are widely used at present: one is chemical elimination, that is, adding a dispersant to the coating liquid formula to eliminate agglomerates or using a defoamer to eliminate the agglomerates in the coating liquid. The other is a physical method, that is, the use of ultrasonic waves, vacuuming, etc., as a physical method to eliminate the coating liquid agglomerate or bubbles, the ultrasonic method is low in cost, simple and easy to implement, but it also has certain defects, namely The ultrasonic wave will cause the temperature change of the coating liquid in the process of eliminating the agglomeration or bubbles of the coating liquid, and the stability of the coating liquid has an important influence on the quality of the coated film, and due to the change of the coating liquid temperature, its Properties such as viscosity and rheology will change accordingly, and changes in the properties of the coating liquid will cause changes in the uniformity of film thickness and coating structure. Temperature stability is a problem that must be considered and solved

[0003] Therefore, most of the traditional methods of using ultrasonic waves to eliminate agglomerates or bubbles in the coating liquid are treated offline, and then natural cooling or cooling treatment is used to restore the coating liquid to normal temperature. However, this method has obvious defects. During the process, the coating liquid is likely to reappear agglomerates or air bubbles and then enter the coating liquid, causing secondary impact on the coating liquid

When some online ultrasonic waves are used to eliminate agglomerates or air bubbles in the coating solution, in most cases the coating accuracy may not be high and the influence of ultrasonic waves on the temperature of the coating solution may be ignored

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